truffle.js

fs = require('fs');

const HDWalletProvider = require("truffle-hdwallet-provider");

const getMnemonic = function (env) {
	try {
		return fs.readFileSync('./config/' + env + '/mnemonic').toString()
	} catch (exception) {
		return "fundrequest"
	}
};

const getSecret = function () {
	try {
		return fs.readFileSync('./config/secrets/infura-token.js').toString();
	} catch (ex) {
		console.log(ex);
		return "";
	}
};

module.exports = {

	networks: {
		development: {
			network_id: '*',
			host: "localhost",
			port: 8545
		},
		local: {
			provider: new HDWalletProvider(getMnemonic('local'), "http://localhost:8545/"),
			network_id: '*',
		},
		kovan: {
			network_id: '42',
			host: "https://kovan.infura.io/" + getSecret(),
			provider: new HDWalletProvider(getMnemonic('kovan'), "https://kovan.infura.io/" + getSecret())
		},
		ropsten: {
			network_id: '3',
			host: "https://ropsten.infura.io/",
			provider: new HDWalletProvider(getMnemonic('ropsten'), "https://ropsten.infura.io/" + getSecret())
		},
		rinkeby: {
			network_id: '4',
			host: "https://rinkeby.infura.io/" + getSecret(),
			provider: new HDWalletProvider(getMnemonic('rinkeby'), "https://rinkeby.infura.io/" + getSecret())
		},
		rinkeby_local: {
			network_id: '4',
			host: "localhost",
			port: 8545,
			gas: 4612388
		},
		solc: {
			optimizer: {
				enabled: true,
				runs: 200
			}
		}
	},
};